From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E3A619F469; Tue, 16 Jul 2024 14:30:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721140227; cv=none; b=aY6ZgKWe0z3h0awQRoFplAfM30GFR75NR3BD9SEL40JOmqEnbZS+53wiafN3pSeAOZk2B+Lkl4ubMUQSoszm24R0A2q9aCixUfNIlP7t9HYsOb9hrocsLYUgZJ50h0yz2ENkM1EpxfJqMIavkWNuAxfpce559M7JhuDzu8r/45Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721140227; c=relaxed/simple; bh=u3eDL3m89BqR3aZoF5Fzrc9E8G8z3esOlf2CP5TfC2s=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=XsdWTkXwIOd4hEBcLXhkaROZv8DdcP+zxTnKQ0kJprzamOagBsXayk9uLyRApxjHgdh2CllII2rlGMXuXO5VJF/s2X2HzWdRZzzM7iQEs9WOSJ/hkWl8F3J49UWWSmSTWEDgfmrjgdJbvpLg/3RDE3Mj5T5bwnppBONwx7nmmAc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CR9YO/bT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="CR9YO/bT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 134C7C4AF0E; Tue, 16 Jul 2024 14:30:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721140224; bh=u3eDL3m89BqR3aZoF5Fzrc9E8G8z3esOlf2CP5TfC2s=; h=From:To:Cc:Subject:Date:From; b=CR9YO/bTdVrhB6dRmW2zE/NlnerYb/D7dOgI8x5le58g7Ja1W1LJtyH/cpXShOpds o+AH0sNk+3cEMYC6/pQ6ysdOM69/MP9xUequKRpDdTBSlIx353d6Ii3j2KSIMsTD+n SVTegg6/rGfYEq3ECW+LUs4VwKUqm6xwklbFLdsp4ftG8TyLbrTOfBmMY6YF3pfrva +sNlLu9czSn1Dn7KEPYi4bKNBbcHcLNn2hbZpF0X+5hxunH7t36PLvxZGL5HclF6ox J1R1hBsCv4ZYjOVZnd0QhA2gJVwJwePl2asRVUv05sIgoHkWe8qeB9udlLE9JOT5BX +DrCQPbunFbLg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yunshui Jiang , Stefan Schmidt , Sasha Levin , alex.aring@gmail.com, miquel.raynal@bootlin.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-wpan@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 1/7] net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD() Date: Tue, 16 Jul 2024 10:30:09 -0400 Message-ID: <20240716143021.2714348-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.4.279 Content-Transfer-Encoding: 8bit From: Yunshui Jiang [ Upstream commit b8ec0dc3845f6c9089573cb5c2c4b05f7fc10728 ] mac802154 devices update their dev->stats fields locklessly. Therefore these counters should be updated atomically. Adopt SMP safe DEV_STATS_INC() and DEV_STATS_ADD() to achieve this. Signed-off-by: Yunshui Jiang Message-ID: <20240531080739.2608969-1-jiangyunshui@kylinos.cn> Signed-off-by: Stefan Schmidt Signed-off-by: Sasha Levin --- net/mac802154/tx.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index c829e4a753256..7cea95d0b78f9 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -34,8 +34,8 @@ void ieee802154_xmit_worker(struct work_struct *work) if (res) goto err_tx; - dev->stats.tx_packets++; - dev->stats.tx_bytes += skb->len; + DEV_STATS_INC(dev, tx_packets); + DEV_STATS_ADD(dev, tx_bytes, skb->len); ieee802154_xmit_complete(&local->hw, skb, false); @@ -86,8 +86,8 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb) goto err_tx; } - dev->stats.tx_packets++; - dev->stats.tx_bytes += len; + DEV_STATS_INC(dev, tx_packets); + DEV_STATS_ADD(dev, tx_bytes, len); } else { local->tx_skb = skb; queue_work(local->workqueue, &local->tx_work); -- 2.43.0